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The graph does not take into account pipe
resistance, valves, load loss produced by the length
of the ducts, the viscosity of the liquid pumped or
the temperature itself.
If necessary, contact our Technical or Customer
Service Departments.
9.10
V-belt transmission
V-belt transmission is permissible only for
versions with no reduction unit.
9.11
Transmission definition
To prevent irregular radial loads on the shaft and the relative
bearing, follow these directions:
a) Use pulleys with V-belts with the size of the groove
required/recommended by the manufacturer of belt used.
In the absence of directions, follow Fig. 10 and the table in
Fig. 11.
Break
corners
Single groove
For this pump model, we recommend to use No. 4 XPB belts
(16.5x13 serrated). Use an XPC profile only for long durations.
Both the characteristics and transmissible power of each
belt can be verified in the diagram in Fig. 9, in relation to the
number of rpm normally declared by the manufacturer.
Minimum duct pulley diameter (on pump shaft): ≥ 250 mm.
The radial load on the shaft must not exceed 7500 N (value
necessary for Layout definition).
The transmission is considered adequate if the load is applied
to a maximum distance a = 40 mm from the shaft shoulder
(P.T.O) as shown in Fig. 12.
Multiple groove
Fig. 10
28
For dimensions differing from those specified
above, contact our Technical or Customer Service
Departments.
Fig. 9
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